Graphophone.



T. P. HALL.

GRAPHOPHONE.

APPLICATION FILED Panzented Jan. 26, 1909.

fulcruming the lever on the thread of tho or jewel tip is carried forthe purpose of-vary- TOMAS PROCTOR HALL, OF VANCOUVER, BRITISH COLUMBIA, CANADA. 7

GRAPHOPHONE.

Specification of Letters Patent.

Patented Jan. 26, 1909.

Application filed October 8, 1907. Serial No. 395,799.

To all whom it may cont-ma;-

Be it known that I, Teams Pnocron HALL, of the city of Vancouver Province of British Columbia, Canada, have invented certain new and useful Improvements in Graphoa phones.

My invention relates particularly to the renroducer and it has for its object to enable tl e amplitude of vibration of the mica diaphragm to be adjusted, and thereby soften or reduce the volume of sound without altering the quality of the tone, or amplify such time; and to this end I provide for the adjustment of the lever upon which the needle ing its fulcrum. For full comprehension, however, of my invention, reference must be had to the accompanying drawings in which similar reference characters indicate the same parts and wherein Figure 1 is a perspective view of a reproducer inverted and drawn to an enlarged scale, with my invention applied thereto; Fig. 2 is a side elevation of the immediate parts thereof to which my invention applies; and Fig. 3 is a plan view thereof.

l he reproducer is indicated at l) and the mica diaphragm at c.

fis the bar upon which is usually mounted the lever g carrying the needle or jewel point 72.. According to my invention the lever 7 is formed with a series of ratchet teeth 7r and it is located slidably between the logs of a U-- bracket m mounted rigidly upon the bar f and serving as a bearing for a rotary spindle 'n carrying a worm-whecl 0 rigidly thereon, the legs of the hearing in being slotted to accommodate such wcwm-whool, while a bow spring 7) carried. by the barf boars across the ends of the Ubracket and retains the lever yieldingly in engagommt with the worm j wheel. 'fhis arrangement has the effect of i l uormnwlxocl 0, while the tail of the lever is as usual connected byawrrcs to the diaphraginc. i In order to soften or reduce the volume of I sound the spindle n is turned to move the lever g with relation to its fulcrum towards the right (looking at, Figs. 2 and 3) thereby reducing'the extent of vibration of the diaphragm which has the effect of making the sound more mellow; and to increase the volume the lever is adjusted in the opposite direction.

What I claim is as follows 7- 1. A talking machine re reducer having a lever for carrying the user le or jewel tip, a

rotary spindle, means securing such spindle permanently against longitudinal movement, and means carried rigidly by the spindle for operatlvely connecting the spindle to the lever whereby the said lever is adjusted with relation to its fulcrum for the purpose of varying the volume of sound.

2. A talking machine reproducer having a lever for carrying the needle or jewel tip, such lever having one side toothed; a worm wheel I operatively engaging the said teeth and upon which the said lever is fulcrumed, and means for rotating the worm wheel for the purpose of adjusting the lever longitudinally relatively to the. said worm wheel.

3. A talking machine reproducei' having a lever for carrying the needle or jewel tip, such lever having one side toothed; a rotary pindle mounted upon the reproducer, a worm wheel mounted rigidly on the s indle and o eratively engaging the said teet 1 and upon wiich the said lever is fulcrumed, a bow spring secured to the reproducer and retain ing the lever yioldingly in engagement with the worm wheel, and means for rotating the worm wheel for the purpose of adj usti'lg the lover longitudinally relatively to the said i worm wheel.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

'l OMAS IROCTOR HALL.

W itnessos EDNA, B. BEARDSLEE, Ho'ru MCMANUS HA 

